books.google.com - How could something we have for free--our bare feet--be better for running than $150 shoes? The truth is that running in shoes is high-impact, unstable, and inflexible. Shoes promote a heel-centric ground strike, which weakens your feet, knees, and hips, and leads to common running injuries. In...http://books.google.com/books/about/Barefoot_Running.html?id=X801PJeLtYEC&q=weightlifting&utm_source=gb-gplus-shareBarefoot Running